The Smart Box by VMAX USA are commercial grade and designed for heavy-duty marine, back-up, automotive, off-grid power supplies, construction and other applications. Vented boxes are water resistant; protect against water splashes but not waterproof if submerged in water. Group 24 Smart Battery Box with Voltmeter digital LED Display and dual Dual USB-C + 1 USB ports, wires with ring ends and mounting strap and brackets. Fit's all traditional battery group sizes Fit's all new orbital or spiral celled, deep cycle, high performance batteries. QuickLock Cover - Easy-on and easy-off. Safe and secure. Convenient, fast, durable. QuickLock prevents cover loss. Use hold-down holes molded in to reinforced handles. Use J-hooks, L-hooks, threaded rod or lag bolts. Remove the lid while keeping the box secure. New Tougher Material - Impact resistant to -30°F (-34°C). Heat stable to +200°F (+93°C). Meets U.S. Coast Guard Regulations 183.420 & ABYCE-10.7. Impervious to acid, gasoline, oil and solvents. Will not rust, UV protected. Battery not included. MADE IN USA